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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkEllipsoidInteriorExteriorSpatialFunction.txx.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:35 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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PURPOSE. See the above copyright notices for more information. |
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=========================================================================*/ |
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#ifndef __itkEllipsoidInteriorExteriorSpatialFunction_txx |
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#define __itkEllipsoidInteriorExteriorSpatialFunction_txx |
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#include "itkEllipsoidInteriorExteriorSpatialFunction.h" |
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#include <math.h> |
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namespace itk |
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{ |
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template <unsigned int VDimension, typename TInput> |
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EllipsoidInteriorExteriorSpatialFunction<VDimension, TInput> |
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::EllipsoidInteriorExteriorSpatialFunction() |
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{ |
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m_Orientations = NULL; |
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m_Axes.Fill(1.0); // Lengths of ellipsoid axes. |
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m_Center.Fill(0.0); // Origin of ellipsoid |
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} |
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template <unsigned int VDimension, typename TInput > |
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EllipsoidInteriorExteriorSpatialFunction<VDimension, TInput> |
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::~EllipsoidInteriorExteriorSpatialFunction() |
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{ |
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unsigned int i; |
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if (m_Orientations) |
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{ |
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for(i = 0; i < VDimension; i++) |
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{ |
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delete []m_Orientations[i]; |
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} |
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delete []m_Orientations; |
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} |
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} |
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template <unsigned int VDimension, typename TInput> |
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typename EllipsoidInteriorExteriorSpatialFunction<VDimension, TInput>::OutputType |
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EllipsoidInteriorExteriorSpatialFunction<VDimension, TInput> |
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::Evaluate(const InputType& position) const |
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{ |
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double distanceSquared = 0; |
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Vector<double, VDimension> orientationVector; |
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Vector<double, VDimension> pointVector; |
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// Project the position onto each of the axes, normalize by axis length, |
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// and determine whether position is inside ellipsoid. The length of axis0, |
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// m_Axis[0] is orientated in the direction of m_Orientations[0]. |
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for(unsigned int i = 0; i < VDimension; i++) |
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{ |
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pointVector[i] = position[i] - m_Center[i]; |
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} |
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for(unsigned int i = 0; i < VDimension; i++) |
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{ |
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for(unsigned int j = 0; j < VDimension; j++) |
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{ |
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orientationVector[j] = m_Orientations[i][j]; |
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} |
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distanceSquared += pow(static_cast<double>((orientationVector * pointVector)/(.5*m_Axes[i])),static_cast<double>(2)); |
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} |
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if(distanceSquared <= 1) |
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{ |
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return 1; // Inside the ellipsoid. |
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} |
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//Default return value assumes outside the ellipsoid |
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return 0; // Outside the ellipsoid. |
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} |
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template <unsigned int VDimension, typename TInput> |
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void EllipsoidInteriorExteriorSpatialFunction<VDimension, TInput> |
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::SetOrientations(const OrientationType &orientations) |
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{ |
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unsigned int i, j; |
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// Initialize orientation vectors. |
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if (m_Orientations) |
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{ |
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for(i = 0; i < VDimension; i++) |
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{ |
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delete []m_Orientations[i]; |
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} |
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delete []m_Orientations; |
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} |
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m_Orientations = new double * [VDimension]; |
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for(i = 0; i < VDimension; i++) |
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{ |
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m_Orientations[i] = new double[VDimension]; |
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} |
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// Set orientation vectors (must be orthogonal). |
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for(i = 0; i < VDimension; i++) |
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{ |
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for(j = 0; j < VDimension; j++) |
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{ |
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m_Orientations[i][j] = orientations[i][j]; |
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} |
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} |
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} |
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template <unsigned int VDimension, typename TInput> |
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void EllipsoidInteriorExteriorSpatialFunction<VDimension, TInput> |
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::PrintSelf(std::ostream& os, Indent indent) const |
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{ |
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unsigned int i, j; |
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Superclass::PrintSelf(os, indent); |
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os << indent << "Lengths of Ellipsoid Axes: " << m_Axes << std::endl; |
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os << indent << "Origin of Ellipsoid: " << m_Center << std::endl; |
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if (m_Orientations) |
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{ |
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os << indent << "Orientations: " << std::endl; |
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for (i = 0; i < VDimension; i++) |
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{ |
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for (j = 0; j < VDimension; j++) |
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{ |
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os << indent << indent << m_Orientations[i][j] << " "; |
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} |
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os << std::endl; |
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} |
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} |
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} |
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} // end namespace itk |
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#endif |
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